Rear suspension portion of a bicycle frame



FIG. 1 is a left side elevation of a rear suspension portion of a bicycle frame of our new design, the broken lines representing the remainder of a bicycle; is shown for illustrative purposes only and form no part of the claimed design;

FIG. 2 is a left perspective view thereof with broken lines representing a portion of a bicycle being shown for illustrative purposes only and form no part of the claimed design;

FIG. 3 is a top plan view thereof;

FIG. 4 is a right side elevation view thereof;

FIG. 5 is a rear elevation thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a right side elevation view thereof; and,

FIG. 8 is a front elevation thereof. 

The ornamental design for a rear suspension portion of a bicycle frame, as shown and described. 